Introduction: 2 Minute Clap Switch

This simple 3 component circuit can be used as a microphone alarm or as a light switch. The way the alarm program works is that it detects changes in sound level and then triggers the light to come on for 5 seconds once the sound level has gone up by 2 or more units.

The light switch works in a similar way except that every time loudness level changes by more than 2 a boolean changes state thus turning the LED on if it was off or off if it was on!


•Arduino Uno

•5mm LED

•Microphone Module


piet parker (author)2016-09-27

High, very nice work.
Very elegant Coding.
Do you have some tips for adjusting the microphone?
My microphone only reacts when i blow on it (some strange i think).
I would appreciate a little help, thanks alot and best Regards

markosioa (author)2015-10-28

Wow! nice and simple! Could I do this with any simple arduino microphone breakout unit? What should I change if I would add my 5metres of LED strip light?

MsSweetSatisfaction (author)2014-10-19

Interesting build! Here's an instructable on how to use the editor in case you want to get rid of that extra step at the end:

Thanks for sharing!

kuukske (author)2014-10-19

Nice project!
I like how simple yet effective the program works.

Robotix_au (author)kuukske2014-10-19

Yea took a while to get the calibration and the Serial port out of it. . . . and when you teach programming to 11 and 12 year olds... simplicity is the way forward!!

kuukske (author)Robotix_au2014-10-19

Nice work!

About This Instructable




Bio: I am robotics engineer and a teacher whose passion in life is breaking down the maths and academic jargon of programming and robotics into something ... More »
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